mesohippus

2 definitions found

mesohippus - Collaborative International Dictionary of English v.0.48 :

  Mesohippus \Mes`o*hip"pus\, n. [NL., fr. Gr. me`sos middle + ? a
     horse.] (Paleon.)
     An extinct mammal of the Horse family, but not larger than a
     sheep, and having three toes on each foot.
     [1913 Webster]

mesohippus - WordNet (r) 2.1 (2005) :

  mesohippus
      n 1: North American three-toed Oligocene animal; probably not
           directly ancestral to modern horses